Eminem is an american rapper, songwriter, music producer, record executive and actor. He is among the world's best selling artists of all time with over 47 million albums and 220 million records sold. The truth is you don't know what is going to happen tomorrow. Life is a crazy ride and nothing is guaranteed. 
People can try to reinvent themselves. I don't think you can really change who you are, though because who you are is pretty much where you came from and what you have done up to now. 